diff --git a/flake.nix b/flake.nix
index 8223c60..79fa98b 100644
--- a/flake.nix
+++ b/flake.nix
@@ -24,7 +24,12 @@
     flake-utils.lib.eachDefaultSystem (
       system:
       let
-        pkgs = nixpkgs.legacyPackages.${system};
+        # Allow the CUDA EULA packages (cuda_nvcc, etc.) needed by the
+        # CUDA-enabled comfyui package.
+        pkgs = import nixpkgs {
+          inherit system;
+          config.allowUnfree = true;
+        };
       in
       {
         packages = import ./pkgs {